Toby Ord counts himself among the world's wealthiest men, but don't be surprised if you have never heard of him.
He makes $52,000 a year as a philosophy researcher at the University of Oxford, so he is no tycoon. Yet that relatively modest salary places him in the top 1 percent of earners on a planet where 800 million people go to bed hungry every night.
It is a troubling income bracket for a man who spends his days thinking about ethics.
So a little over a year ago, Mr....